body {
    font-family: Arial, sans-serif;
}

.calculator {
    width: 300px;
    margin: 50px auto;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

form {
    display: flex;
    flex-direction: column;
}

label {
    margin-top: 10px;
}

input {
    margin-top: 5px;
}

button {
    margin-top: 20px;
    padding: 10px;
    cursor: pointer;
}

#results {
    margin-top: 20px;
}